NO! Do not use Dribbble! Well, do use it, if you can actually, you know, get into it by making other designers like your work. You know, which is easy, especially with the fact that you can't put a description of yourself or upload your work. So, try and get into Dribbble, if you can great, but you probably won't. With that said, the websites I recommend are as follows.
- DeviantArt (Best place by far, but uploading things is annoying.)
- Adobe Behance (Practically impossible to get people to notice you, but once a few do, you're all set.)
- Freelanced.com (Limited storage and paid plans. Would not reccomend unless you're looking for a freelancer.)
I hope this helps!